what is the biology of Yersinia?
- Gram Negative Bacilli
- “Bi-Polar Staining
- Non-lactose fermenter
- Motile at 25° but not at 37°
- Coagulase (+)
- Cold Growth
what does yersinia ferment?
how does yersinia spread?
- fecal-oral if contact with animals (zoonotic)
- Associated with unpasteurized milk, soft cheeses and undercooked pork products
when is there higher incidence of yersinia infeciton?
Higher incidence in cold climates and months
how does the infection of yersinia progress?
- Access to lamina propria is primarily through M cells
- T3SS effectors mediate resistance to mac killing and can trigger apoptosis
- Travel via macrophages to MLN and replicate intracellular.
most yersenia infections occur on who?
what does yersinia infection cause?
yersinia infection has what symptoms?
- Severe abdominal cramping
- Low-grade fever
- Large volume watery diarrhea,
what complications can arise with yersinia enterocolitica?
- Reactive arthritis (HLA-B27)
- Pseudo-appendicitis*/mesenteric adenitis (older children&teens)
- Erythema nodosum** (adults)
what treatment is given to yersinia enterocolitica infection?
how does yersinia look on Hektoen agar?
how does yersinia look on MacConkey agar?